There are a couple of things going for this view...one of the things is that the Transports had the highest volume reversal of the entire rally and I believe the whole year. The SP Midcaps also had a pretty nasty high volume reversal. Bearfund ETF's had their second high volume up day today. There are a few other charts of note which I have included. I will add more commentary later.
Also, at the end of this post is the ISEE Put/Call ratio which demonstrates a fairly extreme optimism. ISEE was discussed on Kenny's blog...so, I thought I would include a chart. it hit 242 today.